[GS] Lag-preserving no-music code

[vegard]

This disables background music (but not sound effects) but without affecting the speed of the code, so it shouldn't reduce lag in the way that the previous no-music code did. Note that I haven't actually tested this on a real console, so I can't be 100% sure if it really works as intended -- I would appreciate your feedback if you try it out.

US:
8131d3f4 2405
8131d3f6 0000

JAP:
8131c47c 2405
8131c47e 0000

Edit: In theory you can change the second number from 0000 to something like 0018 to get "soft music" instead of "no music", but it could screw up the sound slightly since now it will force everything to be at a specific volume rather than whatever it was meant to be (so certain elements in the music can sound relatively softer or louder than it's supposed to).

[Haliinen]

I just tested it and it does indeed preserve the lag with this no music code so I appreciate this one, thanks!

[vegard]

Thanks halii!